### Swift For \u5faa\u74b0\u53d6\u5f97\u503c\u7684\u57fa\u672c\u5beb\u6cd5<\/p>\n
\u5728 Swift \u4e2d\uff0c\u4f7f\u7528 For \u5faa\u74b0\u4f86\u904d\u6b77\u9663\u5217\u662f\u4e00\u500b\u975e\u5e38\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684\u5beb\u6cd5\uff0c\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u904d\u6b77 `testList` \u9663\u5217\u4e26\u5370\u51fa\u6bcf\u500b\u5143\u7d20\u7684\u503c\uff1a<\/p>\n
“`swift
\nvar testList = [“\u6e2c\u8a661”, “\u6e2c\u8a662”]\n
for value in testList {
\n print(“\\(value)”)
\n}
\n“`<\/p>\n
\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u8f38\u51fa\uff1a
\n“`
\n\u6e2c\u8a661
\n\u6e2c\u8a662
\n“`<\/p>\n
### Swift For \u5faa\u74b0\u53d6\u5f97\u7d22\u5f15\u8207\u503c\u7684\u5beb\u6cd5<\/p>\n
\u5982\u679c\u6211\u5011\u9700\u8981\u540c\u6642\u7372\u53d6\u9663\u5217\u4e2d\u7684\u7d22\u5f15\u548c\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 `enumerated()` \u65b9\u6cd5\u3002\u9019\u500b\u65b9\u6cd5\u6703\u8fd4\u56de\u4e00\u500b\u5305\u542b\u7d22\u5f15\u548c\u503c\u7684\u5143\u7d44\u3002\u4ee5\u4e0b\u662f\u5177\u9ad4\u7684\u5beb\u6cd5\u7bc4\u4f8b\uff1a<\/p>\n
“`swift
\nvar testList = [“\u6e2c\u8a661”, “\u6e2c\u8a662”]\n
for (index, value) in testList.enumerated() {
\n print(“\\(index): \\(value)”)
\n}
\n“`<\/p>\n
\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u8f38\u51fa\uff1a
\n“`
\n0: \u6e2c\u8a661
\n1: \u6e2c\u8a662
\n“`<\/p>\n
### \u932f\u8aa4\u6392\u9664<\/p>\n
\u5728\u4f7f\u7528 `enumerated()` \u65b9\u6cd5\u6642\uff0c\u78ba\u4fdd\u9663\u5217\u4e0d\u70ba\u7a7a\u3002\u5982\u679c\u9663\u5217\u70ba\u7a7a\uff0c\u5247\u5faa\u74b0\u4e0d\u6703\u57f7\u884c\uff0c\u9019\u662f\u6b63\u5e38\u884c\u70ba\u3002\u60a8\u53ef\u4ee5\u5728\u4f7f\u7528\u524d\u6aa2\u67e5\u9663\u5217\u7684\u8a08\u6578\uff1a<\/p>\n
“`swift
\nif !testList.isEmpty {
\n for (index, value) in testList.enumerated() {
\n print(“\\(index): \\(value)”)
\n }
\n} else {
\n print(“\u9663\u5217\u70ba\u7a7a\uff0c\u7121\u6cd5\u904d\u6b77\u3002”)
\n}
\n“`<\/p>\n
### \u5ef6\u4f38\u61c9\u7528<\/p>\n
\u5229\u7528 `enumerated()` \u65b9\u6cd5\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u8a31\u591a\u5834\u666f\u4e2d\u61c9\u7528\uff0c\u4f8b\u5982\u70ba\u5217\u8868\u9805\u76ee\u6dfb\u52a0\u7de8\u865f\u3001\u5728\u986f\u793a\u8cc7\u6599\u6642\u63d0\u4f9b\u7d22\u5f15\u7b49\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u9650\u65bc\u5b57\u4e32\u9663\u5217\uff0c\u4e5f\u53ef\u4ee5\u61c9\u7528\u65bc\u6574\u6578\u3001\u7269\u4ef6\u6216\u5176\u4ed6\u985e\u578b\u7684\u9663\u5217\u3002<\/p>\n
“`swift
\nvar numbers = [10, 20, 30, 40]\n
for (index, number) in numbers.enumerated() {
\n print(“\u7b2c \\(index + 1) \u500b\u6578\u5b57\u662f \\(number)”)
\n}
\n“`<\/p>\n
\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u986f\u793a\uff1a
\n“`
\n\u7b2c 1 \u500b\u6578\u5b57\u662f 10
\n\u7b2c 2 \u500b\u6578\u5b57\u662f 20
\n\u7b2c 3 \u500b\u6578\u5b57\u662f 30
\n\u7b2c 4 \u500b\u6578\u5b57\u662f 40
\n“`<\/p>\n
### \u7d50\u8a9e<\/p>\n
\u5728 Swift \u4e2d\uff0c\u4f7f\u7528 For \u5faa\u74b0\u914d\u5408 `enumerated()` \u65b9\u6cd5\u662f\u4e00\u500b\u975e\u5e38\u6709\u6548\u7387\u7684\u65b9\u5f0f\u4f86\u540c\u6642\u7372\u53d6\u7d22\u5f15\u548c\u5c0d\u61c9\u7684\u503c\u3002\u5e0c\u671b\u9019\u7bc7\u6559\u5b78\u80fd\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u548c\u904b\u7528 Swift \u7684 For \u5faa\u74b0\u3002<\/p>\n
### Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
**Q1: Swift \u4e2d\u7684 For \u5faa\u74b0\u53ef\u4ee5\u7528\u4f86\u904d\u6b77\u5b57\u5178\u55ce\uff1f**
\nA1: \u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 For \u5faa\u74b0\u904d\u6b77\u5b57\u5178\uff0c\u901a\u904e `for (key, value) in dictionary` \u7684\u65b9\u5f0f\u4f86\u7372\u53d6\u9375\u548c\u503c\u3002<\/p>\n
**Q2: \u70ba\u4ec0\u9ebc\u8981\u4f7f\u7528 `enumerated()` \u800c\u4e0d\u662f\u50b3\u7d71\u7684\u7d22\u5f15?**
\nA2: \u4f7f\u7528 `enumerated()` \u53ef\u4ee5\u4f7f\u4ee3\u78bc\u66f4\u52a0\u7c21\u6f54\uff0c\u4e26\u907f\u514d\u624b\u52d5\u7ba1\u7406\u7d22\u5f15\uff0c\u6e1b\u5c11\u51fa\u932f\u7684\u6a5f\u6703\u3002<\/p>\n
**Q3: \u6709\u6c92\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u904d\u6b77\u9663\u5217\uff1f**
\nA3: \u9664\u4e86 For \u5faa\u74b0\u5916\uff0c\u60a8\u9084\u53ef\u4ee5\u4f7f\u7528 `forEach` \u65b9\u6cd5\u4f86\u904d\u6b77\u9663\u5217\uff0c\u9019\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u4ee5\u63d0\u4f9b\u66f4\u7c21\u6f54\u7684\u8a9e\u6cd5\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
Swift For\u5faa\u74b0\u666e\u901a\u53d6\u5f97Value\u5beb\u6cd5
\nSwift For\u5faa\u74b0\u53d6\u5f97Index,Value\u5beb\u6cd5<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[62,63,64,65],"class_list":["post-264","post","type-post","status-publish","format-aside","hentry","category-swift","tag-enumerated","tag-for","tag-index","tag-value","post_format-post-format-aside"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-4g","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=264"}],"version-history":[{"count":3,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/264\/revisions"}],"predecessor-version":[{"id":1006,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/264\/revisions\/1006"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}